/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkAMRDualContour.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
/**
 * @class   vtkAMRDualContour
 * @brief   Extract particles and analyse them.
 *
 * This filter takes a cell data volume fraction and generates a polydata
 * surface.  It also performs connectivity on the particles and generates
 * a particle index as part of the cell data of the output.  It computes
 * the volume of each particle from the volume fraction.
 *
 * Input should be a vtkNonOverlappingAMR data.
 *
 * This will turn on validation and debug i/o of the filter.
 * \code{.cpp}
 * #define vtkAMRDualContourDEBUG
 * #define vtkAMRDualContourPROFILE
 * \endcode
 */

#ifndef vtkAMRDualContour_h
#define vtkAMRDualContour_h

#include "vtkMultiBlockDataSetAlgorithm.h"
#include "vtkPVVTKExtensionsAMRModule.h" //needed for exports

class vtkDataSet;
class vtkImageData;
class vtkPolyData;
class vtkNonOverlappingAMR;
class vtkPoints;
class vtkDoubleArray;
class vtkCellArray;
class vtkCellData;
class vtkIntArray;
class vtkFloatArray;
class vtkMultiProcessController;
class vtkDataArraySelection;
class vtkCallbackCommand;

class vtkAMRDualGridHelper;
class vtkAMRDualGridHelperBlock;
class vtkAMRDualGridHelperFace;
class vtkAMRDualContourEdgeLocator;

class VTKPVVTKEXTENSIONSAMR_EXPORT vtkAMRDualContour : public vtkMultiBlockDataSetAlgorithm
{
public:
  static vtkAMRDualContour* New();
  vtkTypeMacro(vtkAMRDualContour, vtkMultiBlockDataSetAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  vtkSetMacro(IsoValue, double);
  vtkGetMacro(IsoValue, double);

  ///@{
  /**
   * These are to evaluate performances. You can turn off capping, degenerate cells
   * and multiprocess communication to see how they affect speed of execution.
   * Degenerate cells is the meshing between levels in the grid.
   */
  vtkSetMacro(EnableCapping, int);
  vtkGetMacro(EnableCapping, int);
  vtkBooleanMacro(EnableCapping, int);
  vtkSetMacro(EnableDegenerateCells, int);
  vtkGetMacro(EnableDegenerateCells, int);
  vtkBooleanMacro(EnableDegenerateCells, int);
  vtkSetMacro(EnableMultiProcessCommunication, int);
  vtkGetMacro(EnableMultiProcessCommunication, int);
  vtkBooleanMacro(EnableMultiProcessCommunication, int);
  ///@}

  ///@{
  /**
   * This flag causes blocks to share locators so there are no
   * boundary edges between blocks. It does not eliminate
   * boundary edges between processes.
   */
  vtkSetMacro(EnableMergePoints, int);
  vtkGetMacro(EnableMergePoints, int);
  vtkBooleanMacro(EnableMergePoints, int);
  ///@}

  ///@{
  /**
   * A flag that causes the polygons on the capping surfaces to be triagulated.
   */
  vtkSetMacro(TriangulateCap, int);
  vtkGetMacro(TriangulateCap, int);
  vtkBooleanMacro(TriangulateCap, int);
  ///@}

  ///@{
  /**
   * An option to turn off copying ghost values across process boundaries.
   * If the ghost values are already correct, then the extra communication is
   * not necessary.  If this assumption is wrong, this option will produce
   * cracks / seams.
   */
  vtkSetMacro(SkipGhostCopy, int);
  vtkGetMacro(SkipGhostCopy, int);
  vtkBooleanMacro(SkipGhostCopy, int);
  ///@}

  vtkGetObjectMacro(Controller, vtkMultiProcessController);
  virtual void SetController(vtkMultiProcessController*);

protected:
  vtkAMRDualContour();
  ~vtkAMRDualContour() override;

  double IsoValue;

  // Algorithm options that may improve performance.
  int EnableDegenerateCells;
  int EnableCapping;
  int EnableMultiProcessCommunication;
  int EnableMergePoints;
  int TriangulateCap;
  int SkipGhostCopy;

  int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;

  /**
   * This should be called before any number of calls to DoRequestData
   */
  void InitializeRequest(vtkNonOverlappingAMR* input);

  /**
   * This should be called after any number of calls to DoRequestData
   */
  void FinalizeRequest();

  /**
   * Not a pipeline function. This is a helper function that
   * allows creating a new data set given a input and a cell array name.
   */
  vtkMultiBlockDataSet* DoRequestData(vtkNonOverlappingAMR* input, const char* arrayNameToProcess);

  int FillInputPortInformation(int port, vtkInformation* info) override;
  int FillOutputPortInformation(int port, vtkInformation* info) override;

  void ShareBlockLocatorWithNeighbors(vtkAMRDualGridHelperBlock* block);

  void ProcessBlock(vtkAMRDualGridHelperBlock* block, int blockId, const char* arrayName);

  void ProcessDualCell(vtkAMRDualGridHelperBlock* block, int blockId, int x, int y, int z,
    vtkIdType cornerOffsets[8], vtkDataArray* volumeFractionArray);

  void AddCapPolygon(int ptCount, vtkIdType* pointIds, int blockId);

  // This method is getting too many arguments!
  // Capping was an after thought...
  void CapCell(
    // block coordinates
    int cellX, int cellY, int cellZ,
    // Which cell faces need to be capped.
    unsigned char cubeBoundaryBits,
    // Marching cubes case for this cell
    int cubeCase,
    // Ids of the point created on edges for the internal surface
    vtkIdType edgePtIds[12],
    // Locations of 8 corners. (xyz4xyz4...) 4th value is not used.
    double cornerPoints[32],
    // The id order is VTK from marching cube cases.  Different than axis ordered "cornerPoints".
    vtkIdType cornerOffsets[8],
    // For block id array (for debugging).  I should just make this an ivar.
    int blockId,
    // For passing attributes to output mesh
    vtkDataSet* inData);

  // Stuff exclusively for debugging.
  vtkIntArray* BlockIdCellArray;
  vtkFloatArray* TemperatureArray;

  // Ivars used to reduce method parrameters.
  vtkAMRDualGridHelper* Helper;
  vtkPolyData* Mesh;
  vtkPoints* Points;
  vtkCellArray* Faces;

  vtkMultiProcessController* Controller;

  // I made these ivars to avoid allocating multiple times.
  // The buffer is not used too many times, but ...
  int* MessageBuffer;
  int* MessageBufferLength;

  vtkAMRDualContourEdgeLocator* BlockLocator;

  // Stuff for passing cell attributes to point attributes.
  void InitializeCopyAttributes(vtkNonOverlappingAMR* hbdsInput, vtkDataSet* mesh);
  void InterpolateAttributes(vtkDataSet* uGrid, vtkIdType offset0, vtkIdType offset1, double k,
    vtkDataSet* mesh, vtkIdType outId);
  void CopyAttributes(vtkDataSet* uGrid, vtkIdType inId, vtkDataSet* mesh, vtkIdType outId);
  void FinalizeCopyAttributes(vtkDataSet* mesh);

private:
  vtkAMRDualContour(const vtkAMRDualContour&) = delete;
  void operator=(const vtkAMRDualContour&) = delete;
};

#endif
